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Published Articles >> Table of Contents >> Abstract
Fifth IEEE Workshop on Mobile Computing Systems & Applications
p. 44
Energy Efficiency through Burstiness
Athanasios E. Papathanasiou, University of Rochester
Michael L. Scott, University of Rochester
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/MCSA.2003.1240766
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| Abstract |
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OS resource management policies traditionally employ
buffering to "smooth out" fluctuations in resource demand.
By minimizing the length of idle periods and the level of
contention during non-idle periods, such smoothing tends
to maximize overall throughput and minimize the latency
of individual requests. For certain important devices, however
(disks, network interfaces, or even computational elements),
smoothing eliminates opportunities to save energy
using low-power modes. As devices with such modes proliferate,
and as energy efficiency becomes an increasingly
important design consideration, we argue that OS policies
should be redesigned to increase burstiness for energy-sensitive
devices.
We are currently experimenting with techniques to increase
the disk access pattern burstiness of the Linux operating
system. Our results indicate that the deliberate creation
of bursty activity can save up to 78.5% of the energy
consumed by a Hitachi DK23DA disk (in comparison with
current policies), while simultaneously decreasing the negative
impact of disk congestion and spin-up latency on application
performance.
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 Additional Information
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Citation:
Athanasios E. Papathanasiou, Michael L. Scott,
"Energy Efficiency through Burstiness,"
wmcsa,
p. 44,
Fifth IEEE Workshop on Mobile Computing Systems & Applications,
2003
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